Electric motor



A. G. REDMOND ELECTRIC MOTOR Nov. 26, 1929.

Filed May 18, 1925 wat Patented Nov. 26, 1929y UNITED STATES PATENTOFFICE ALBERTG. REDMOND, OF FLINT, MICHIGAN, ASSIGNOR TO MARVELCARB'URETER COM- PANY, OE FLIN T, MICHIGAN, A CORPORATION 0F DELAWAREELECTRIC MOTOR Application filed May 18, 1925. Serial No. 81,080.

This invention relatesto certain new and useful improvements in fuelfeeding systems for motor vehicles and is a companion application of myapplication filed even dateherewith, the object being to provide acircuit maker and breaker in which a solenoid 1s employed for holdingthe contacts out of engagement with one another while the d1aphragm ofthe pump is moving in a direction to discharge the fuel to thecarbureter.

Another object of my invention is to provide a novel construction ofsolenoid and operating means whereby a movable core is moved into andout of the coil of the solenoid by the movement of the diaphragm so asto hold the movable contact out of engagement with the fixed contact andto release the same in order to allow it to be moved by the springaction into engagement with the fixed contact to complete the circuitthrough the main solenoid for operatinfr the diaphragm.

Other and furt er objects and advantages of the invention will behereinafter set forth and the novel features thereof defined by theappended claims.

In the drawings I have shown a vertical section through a pump used inconnection with my improved construction of fuel feeding system in which1 indicates a diaphragm pump provided with the usual valve chamber 2 inwhich inlet and outlet valves are arranged controlling the fiow of fuelfrom the low level tank to the carbureter and in the drawing I haveshown a pipe 3 leading from the low level tank and a pipe 4 leading tothe carbureter of the internal combustion engine to which my improvedconstruction of fuel feeding system is applied. 'An air chamber `5 isprovided for maintaining the fuel passing to the carbureter at constantpressure.

A casing 6 is secured to the diaphragm pump which is constructedsubstantially the same as shown in my companion application and has aflexible diaphragm 7 to which a fixed core 8 is secured surrounded bycoil 9 arranged within the casing 6 and in which is a fixed core 10. Thecore 9 forming the solenoid is arranged within an electric circuit 11,the source of energy being in the form of a battery 12 and the diaphragmis adapted to Iby the solenoid and be moved in one direction when thecircuit is completed through the coil and forced in to a reversedirection by a coil spring 13, the diaphragm on the suction stroke beingmoved on its discharge stroke by the coil sprin 13.

Arranged wit in the electric circuit 11 is a fixed contact 14 and amovable contact 15 which is carried by a pivoted arm 16 normally held incontact wit-h the fixed contact by coil spring 17, said pivoted armbeing mounted on a post 18 and the fixed contact is mounted on a post 19carried by the casing 6.

Disposed against the end of the casing 6 is a casing 20 in which ismounted a movable core 21 Which has a sliding connection through thehead 22 with a rod 23 carried by the diaphragm 7 and the core 8 so thatthe movable core 21 will be moved back and forth Within a coil 24forming an auxiliary solenoid which is in electric circuit from thesource of supply as clearly shown, said electric circuit being completeat all times so that when the core is Within thecoil, it will attractthe arm 16 so as to hold the movable contact out of engagement with thefixed contact.

When the pump is in operation so as to lift fuel from a low level tankto the carbureter of an internal combustion engine, when the circuit iscompleted through the movable contacts 14 and 157 the diaphragm is movedto the left so as to suck fuel from the low level tank into the chamberof the pump and when the circuit is broken, the spring 21 forces thediaphragm to the right so as to discharge the fuel drawn therein andforce it to the charge forming device.

In the drawing I have shown the contacts left open and the springspushing the diaphragm to the right so as to discharge the fuel therefromand asthe diaphragm moves, the rod 23 carried thereby slides within themovable core 21 until it reaches the end of the exhaust stroke orapproximately so where the movable core is drawn out from the coil 20,which releases the magnetic force which has held the contacts out ofengagement with one another so that the movable contact by the action ofthe spring will be forced intov engagement with the fixed contact whichcompletes the electric circuit through the main solenoid so as to returnthe piston or diaphragm of the pump in order to produce a suctionstroke. This is repeated so long as the fuel is being consume-d by theinternal combustion engine and when the pressure in the feed line fromthe pump to the carburetor the pump.

What I claim is 1. A motor comprising a solenoid, an electric circuit inwhich said solenoid is arranged, 'a source of current, a circuit makerand breaker. in said electric circuit, a second solenoid arranged inelectric circuit having a movable core and a rod having a slidingconnection with said movable core for intermittently moving said coreinto and out of said solenoid for making and breaking said electriccircuit.

2. A motor having a reciprocating member, a spring for moving saidmember in one direction, a solenoid for moving said member in theopposite direction, an electric circuit in which said solenoidisarranged, a circuit maker and breaker in said electric circuit, a secondsolenoid arranged in electric circuit having a movable core, and aconnection between said movable core and said reciprocating member formoving said core into and out of said second solenoid for operating saidcircuit maker and breaker.

3. A motor having a reciprocating member, a spring for moving saidmember in one direction, a solenoid for moving said member in theopposite direction, an electric circuit in which said solenoid isarranged, a fixed contact and a movable contact in said electriccircuit, means for normally holding said contacts in engagement with oneanother and a second solenoid having a movable core operatedl by saidmovable member for holding said movable Contact out of engagement withthe fixed contact for breaking the electric circuit.

4. A motor having a reciprocating member, a spring for moving saidmember in one direction, a solenoid for moving ,said member in theoppositedirection, an electric circuit in which said solenoid isarranged, a source of current, a circuit maker and breaker in saidelectric circuit, means for normally holding said circuit maker andbreaker in closed position, and a second solenoid arranged in electriccircuit having a movable (fore operated by said movable member forbreaking said first named electric circuit.

5. motor having a reciprocatingl member, a spring for moving said memberin one direction, a solenoid for moving said member in the oppositedirection, an electric circuit in which said Asolenoid is arranged, asource of current, a second solenoid arranged in electric circuit havinga movable core, a rod having a sliding connection with said movablemember and means operated by said second solenoid for breaking saidcircuit.

` 6. A motor having a reciprocating member, a spring for moving saidmember in one direction, a solenoid for moving said member in theopposite direction, an electric circuit in which said solenoid isarranged, a fixed contact and a movable contact arranged in saidcircuit, means normally holding said movable contact in engagement withthe fixed contact, a second solenoid arranged in electric circuit havinga movable core. a rod having a connection with said movable member and asliding connection with said core for moving said core into and out ofsaid solenoid for intermittently making and breaking said circuit.

7 A motor having a reciprocating member, a spring for moving said memberin one direction, a solenoid for moving said member in the oppositedirection, an electric circuit in which said solenoid is arranged, asource of current, a second solenoid arranged in electric circuit, acircuit maker and breaker, said second solenoid having a movable core. arod carried by the movable member of said motor having a slidingconnection with said core for intermittently moving said movable coreinto and out of said second. solenoid for intermittently making andbreaking said circuit.

8. A motor having a reciprocating member, a spring for moving saidmember in one direction, a solenoid for moving said member in theopposite direction, an electric circuit in which said solenoid isarranged, a circuit maker and breaker, said electric circuit comprisinga fixed and a movable contact, a spring for moving said movable contactinto engagement with said fixed contact and an electric magnet means formoving said movable contact out of engagement with said fixed contact,said electric magnet means being operated by the movement of saidmovable member.

9. A motor having a reciprocating member, a spring for moving saidmember in one direction, a solenoid for moving said member in theopposite direction, an electric circuit in Which said solenoid isarranged, said solenoid being adapted to move said movable member-in onedirection, a spring for moving said member in a reverse direction, a

i,737,ass

source of current, a circuit maker and breaker in said circuit, a secondsolenoid arranged in electric circuit with said tiret mentioned solenoidand means operated by said movable member for intermittently making andbreaking the electric circuit of the rst mentioned solenoid.

n testimony whereof I hereunto eix my signature.

ALBERT G. REDMOND.

CERTIFICATE 0F CORRECTiON.

Patent No. 1,737,388. Granted November 26, i929, to

ALBERT? G. REDMND.

It is hereby certified that the Stateot incorporation ci the assignee inthe above numbered patent was erroneously given as "Delaware", Whereassaid State should have been given as "Indiana", as shown by the recordset assignments in this office; and that the said Letters Patent shouidbe read with this correction therein that the same may conform to therecord of the oase in the Patent Dffice.

Signed and sealed this 14th day ot January, A. D. i930.

M. i. Moore,

(Seal) Acting Commissioner of Patents.

